Find Wavelength Homework: Solve with Plank's Constant

[Noreturn]

Homework Statement

https://imgur.com/a/9UhMA

Homework Equations

Wavelength = planks constant/ mass*velocity

The Attempt at a Solution

(6.626*10^-34)/((9.11*10^-31)(.01*10^8)) = .728nm

which is an option but they have .243nm as the answer and I don't know where I did it wrong or what I needed to convert.

 

[RedDelicious]

What does the speed 0.01c mean to you?

 

[haruspex]

.728nm
which is an option

Look again.

 

[Noreturn]

OH didn't even notice that it's a weird unit on the .728.

So .01 means it's going 1% the speed of light.

 

[RedDelicious]

So .01 means it's going 1% the speed of light.

Yes

 

[Noreturn]

So where did I do the math wrong?

 

[RedDelicious]

So where did I do the math wrong?

The speed of light is 3*10^8 m/s

What is 1% of that?

Is that the speed you used in your calculation?

 

[Noreturn]

Oh perfect, thank you I don't know how I didn't catch that.